Biological surgical dressing

Abstract

A biological surgical dressing, especially a surgical dressing for wounds composed of a combination of collagen fibers and carbamide, primarily in a ratio of 65 to 99 percent by weight collagen fibers and 1 to 35 percent by weight carbamide.

What is claimed is: 
     
       1. A biological surgical dressing, especially a surgical dressing for wounds, comprising a combination of collagen fibers and carbamide, there being present 65 to 99 percent by weight collagen fibers and 1 to 35 percent by weight carbamide. 
     
     
       2. The surgical dressing as defined in claim 1, wherein the collagen fibers are present in an amount of 80 to 95 percent by weight and the carbamide in an amount of 5 to 20 percent by weight. 
     
     
       3. The surgical dressing as defined in claim 1, wherein the surgical dressing is in the form of a film. 
     
     
       4. The surgical dressing as defined in claim 1, wherein the surgical dressing is in the form of a foil. 
     
     
       5. The surgical dressing as defined in claim 1, wherein the collagen fibers of the surgical dressing consist of animal material. 
     
     
       6. The surgical dressing as defined in claim 5, wherein the animal material is the skin of an animal. 
     
     
       7. The surgical dressing as defined in claim 5, wherein the collagen fibers of animal material are obtained by subjecting the animal material to alkaline swelling, washing and acid treatment, and transformation of the thus swelled and cleaned material into fibers by mechanical splitting and drying of such material. 
     
     
       8. The surgical dressing as defined in claim 7, wherein the alkaline swelling is accomplished with lime milk. 
     
     
       9. The surgical dressing as defined in claim 7, wherein the acid treatment is accomplished with hydrochloric acid.